51231154512 has 40 divisors (see below), whose sum is σ = 134516782240. Its totient is φ = 16797098880.

The previous prime is 51231154433. The next prime is 51231154517. The reversal of 51231154512 is 21545113215.

It is a self number, because there is not a number n which added to its sum of digits gives 51231154512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51231154517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8745562 + ... + 8751417.

It is an arithmetic number, because the mean of its divisors is an integer number (3362919556).

Almost surely, 2^51231154512 is an apocalyptic number.

It is an amenable number.

51231154512 is an abundant number, since it is smaller than the sum of its proper divisors (83285627728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51231154512 is a wasteful number, since it uses less digits than its factorization.

51231154512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17497051 (or 17497045 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

Adding to 51231154512 its reverse (21545113215), we get a palindrome (72776267727).

The spelling of 51231154512 in words is "fifty-one billion, two hundred thirty-one million, one hundred fifty-four thousand, five hundred twelve".